I am using a K65 with a clock speed of 144 MHz on my target board. I am not having much luck using the ETM trace capability with IAR's IDE and Segger's J-Trace. I am able to do this with a simple project running with a clock speed of 20 MHz so I'm thinking that the trace signals aren't clean enough. I've tried to follow the recommendations for the trace signals on my target pcb. Has anyone been able to use ETM trace with faster clock speeds? If so with what clock speeds, what trace length and spacing, and what values for any source terminating resistors?